Yule for the city: The annual Christmas market at Gendarmenmarkt opens for business in Berlin. Christmas markets, with their stalls selling mulled wine, tree decorations and other delights, are an integral part of the German Christmas tradition.

Photo: Sean Gallup, Getty Images

Yule for the city: The annual Christmas market at Gendarmenmarkt...

Yule for the city: The annual Christmas market at Gendarmenmarkt... Photo-3801476.53030 - SFGate